.240 Holland & Holland Magnum
Type Rifle
Place of origin England
Production history
Designer Holland & Holland
Designed 1920
Manufacturer Holland & Holland
Variants .240 Flanged
Case type Rimless, Rimmed
Bullet diameter .245 in (Bad rounding hereScript error mm)
Neck diameter .274 in (Bad rounding hereScript error mm)
Shoulder diameter .403 in (Bad rounding hereScript error mm)
Base diameter .450 in (Bad rounding hereScript error mm)
Rim diameter .467 in (Bad rounding hereScript error mm)
Rim thickness .035 in (Bad rounding hereScript error mm)
Case length 2.49 in (Bad rounding hereScript error mm)
Overall length 3.21 in (Bad rounding hereScript error mm)
Primer type Berdan
Ballistic performance
Bullet weight/type Velocity Energy
100 gr (Bad rounding hereScript error g) SP2,900 ft/s (Bad rounding hereScript error m/s)1,865 ft·lbf (Bad rounding hereScript error J)
Source(s): "Cartridges of the World" [1]

The .240 Holland and Holland Magnum (also known as the .240 Apex, .240 Belted Nitro Express, .240 Magnum Rimless, or .240 Super Express) is a centrefire sporting rifle cartridge developed in England in the 1920s, primarily for use in hunting deer and plains game. This round has always been closely associated with the firm of Holland and Holland, rifle and gun makers of London, England, which has built more magazine and double rifles in this calibre than anyone else. A rimmed variant of this cartridge, known as the .240 Magnum Flanged, was developed for use in double rifles.[1]


A number of Lloyd rifles were made in the period 1930 - 1950 for the .240 H&H cartridge, and David Lloyd took it as the starting point in his development of his .244 H&H Magnum cartridge, which uses the same distinctive .245 in (Bad rounding hereScript error mm) diameter bullet, (NOT the standard .243 bullet) but fired from a much larger case.[2]

The ballistic performance of the .240 H&H in factory loads is very similar to that of the .243 Winchester, with a 100-grain (Bad rounding hereScript error g) bullet giving a muzzle velocity of approximately 2,900 feet per second (Bad rounding hereScript error m/s). When it is loaded at the same pressure as the .243 WSSM using modern powders, the .240 H&H has the potential for slightly better performance.[2]

The case dimensions of the .240 are not unlike those of the wildcat 6mm-06 (the .30-06 Springfield cartridge case necked down to accept a 6mm/.244 bullet), but the .240 case has a fractionally, .002, larger diameter, and the case is distinctive in appearance owing to its long neck.

Most bolt-action rifles made for the .240 H&H will be amply strong enough to handle handloaded cartridges at high pressure.

.240 H&H Performance Comparison
Cartridge Bullet weight Muzzle velocity Muzzle energy
.240 H&H Magnum 100 gr (Bad rounding hereScript error g) 2,900 ft/s (Bad rounding hereScript error m/s) 1,865 ft·lbf (Bad rounding hereScript error J)
.240 Weatherby Magnum 100 gr (Bad rounding hereScript error g) 3,406 ft/s (Bad rounding hereScript error m/s) 2,576 ft·lbf (Bad rounding hereScript error J)
.243 Winchester 100 gr (Bad rounding hereScript error g) 2,960 ft/s (Bad rounding hereScript error m/s) 1,945 ft·lbf (Bad rounding hereScript error J)
.243 Winchester Super Short Magnum 100 gr (Bad rounding hereScript error g) 3,110 ft/s (Bad rounding hereScript error m/s) 2,147 ft·lbf (Bad rounding hereScript error J)
.244 H&H Magnum 100 gr (Bad rounding hereScript error g) 3,500 ft/s (Bad rounding hereScript error m/s) 2,720 ft·lbf (Bad rounding hereScript error J)
6 mm Remington 100 gr (Bad rounding hereScript error g) 3,100 ft/s (Bad rounding hereScript error m/s) 2,133 ft·lbf (Bad rounding hereScript error J)

See alsoEdit


  1. 1.0 1.1 Script error
  2. 2.0 2.1 "The .240 Apex" by Chuck Hawks

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